Ziggy, also known as the "Demon King" and formerly the "King of Robots", was a robot from Granbell, Shiki's surrogate grandfather, the former ruler of the Sakura Cosmos, as well as the creator of the Four Shining Stars, Four Dark Stars and E.M. Pino; he was also a former pupil of Xenolith and was a member of the Oración Seis Galáctica. Ziggy was originally the captain of the warship Edens Zero and used its successor ship, the Edens One, alongside his Skeleton Army to conquest humankind.
During the battle on Lendard, Ziggy is revealed to be Shiki Granbell from an alternate universe 20,000 years in the future. It is also revealed that he possesses two personalities: his original, kindhearted self whom Shiki viewed as a grandfather, and the evil personality of the Edens One's high performance AI.